nodeguy/src/cpp/lib/QtGui/QPixmap/qpixmap_wrap.cpp

#include "QtGui/QPixmap/qpixmap_wrap.h"

#include "Extras/Utils/nutils.h"
#include "QtCore/QVariant/qvariant_wrap.h"
#include "QtGui/QImage/qimage_wrap.h"

Napi::FunctionReference QPixmapWrap::constructor;

Napi::Object QPixmapWrap::init(Napi::Env env, Napi::Object exports) {
  Napi::HandleScope scope(env);
  char CLASSNAME[] = "QPixmap";
  Napi::Function func = DefineClass(
      env, CLASSNAME,
      {InstanceMethod("load", &QPixmapWrap::load),
       InstanceMethod("loadFromData", &QPixmapWrap::loadFromData),
       InstanceMethod("save", &QPixmapWrap::save),
       InstanceMethod("scaled", &QPixmapWrap::scaled),
       InstanceMethod("height", &QPixmapWrap::height),
       InstanceMethod("width", &QPixmapWrap::width),
       StaticMethod("fromImage", &QPixmapWrap::fromImage),
       StaticMethod("fromQVariant", &StaticQPixmapWrapMethods::fromQVariant),
       COMPONENT_WRAPPED_METHODS_EXPORT_DEFINE(QPixmapWrap)});
  constructor = Napi::Persistent(func);
  exports.Set(CLASSNAME, func);
  return exports;
}

QPixmapWrap::QPixmapWrap(const Napi::CallbackInfo& info)
    : Napi::ObjectWrap<QPixmapWrap>(info) {
  Napi::Env env = info.Env();
  if (info.Length() == 1) {
    if (info[0].IsExternal()) {
      this->instance = std::unique_ptr<QPixmap>(
          info[0].As<Napi::External<QPixmap>>().Data());
    } else {
      Napi::String url = info[0].As<Napi::String>();
      QString imageUrl = QString::fromUtf8(url.Utf8Value().c_str());
      this->instance = std::make_unique<QPixmap>(imageUrl);
    }
  } else if (info.Length() == 0) {
    this->instance = std::make_unique<QPixmap>();
  } else {
    Napi::TypeError::New(env, "Wrong number of arguments")
        .ThrowAsJavaScriptException();
  }
  this->rawData = extrautils::configureComponent(this->getInternalInstance());
}

QPixmapWrap::~QPixmapWrap() { this->instance.reset(); }

QPixmap* QPixmapWrap::getInternalInstance() { return this->instance.get(); }

Napi::Value QPixmapWrap::load(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();
  bool loadSuccess = false;
  if (info.Length() == 1) {
    Napi::String url = info[0].As<Napi::String>();
    QString imageUrl = QString::fromUtf8(url.Utf8Value().c_str());
    loadSuccess = this->instance->load(imageUrl);
  } else {
    Napi::TypeError::New(env, "Wrong number of arguments")
        .ThrowAsJavaScriptException();
  }
  return Napi::Boolean::New(env, loadSuccess);
}

Napi::Value QPixmapWrap::loadFromData(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();
  bool loadSuccess = false;

  if (info.Length() > 0 && info.Length() < 3) {
    Napi::Buffer<uchar> buffer = info[0].As<Napi::Buffer<uchar>>();

    if (info.Length() > 1) {
      Napi::String format = info[1].As<Napi::String>();
      loadSuccess = this->instance->loadFromData(buffer.Data(), buffer.Length(),
                                                 format.Utf8Value().c_str());
    } else {
      loadSuccess =
          this->instance->loadFromData(buffer.Data(), buffer.Length());
    }
  } else {
    Napi::TypeError::New(env, "Wrong number of arguments")
        .ThrowAsJavaScriptException();
  }
  return Napi::Boolean::New(env, loadSuccess);
}

Napi::Value QPixmapWrap::save(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();
  bool loadSuccess = false;
  if (info.Length() >= 1 && info.Length() <= 3) {
    QString fileName =
        QString::fromUtf8(info[0].As<Napi::String>().Utf8Value().c_str());
    if (info.Length() >= 2) {
      loadSuccess = this->instance->save(
          fileName, info[1].As<Napi::String>().Utf8Value().c_str());
    } else {
      loadSuccess = this->instance->save(fileName);
    }
  } else {
    Napi::TypeError::New(env, "Wrong number of arguments")
        .ThrowAsJavaScriptException();
  }
  return Napi::Boolean::New(env, loadSuccess);
}

Napi::Value QPixmapWrap::scaled(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();
  Napi::Number widthValue = info[0].As<Napi::Number>();
  Napi::Number heightValue = info[1].As<Napi::Number>();
  int width = widthValue.Int32Value();
  int height = heightValue.Int32Value();
  Qt::AspectRatioMode aspectRatioMode = Qt::IgnoreAspectRatio;
  Qt::TransformationMode transformationMode = Qt::FastTransformation;
  if (info.Length() > 2) {
    int aspectRatioModeInt = info[2].As<Napi::Number>().Int32Value();
    aspectRatioMode = static_cast<Qt::AspectRatioMode>(aspectRatioModeInt);
  }
  if (info.Length() > 3) {
    int transformationModeInt = info[3].As<Napi::Number>().Int32Value();
    transformationMode =
        static_cast<Qt::TransformationMode>(transformationModeInt);
  }
  QPixmap* updatedPixMap = new QPixmap(this->instance->scaled(
      width, height, aspectRatioMode, transformationMode));
  auto instance = QPixmapWrap::constructor.New(
      {Napi::External<QPixmap>::New(env, updatedPixMap)});
  return instance;
}

Napi::Value QPixmapWrap::height(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();
  return Napi::Value::From(env, this->instance->height());
}
Napi::Value QPixmapWrap::width(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();
  return Napi::Value::From(env, this->instance->width());
}

Napi::Value QPixmapWrap::fromImage(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();

  QImage* img = Napi::ObjectWrap<QImageWrap>::Unwrap(info[0].As<Napi::Object>())
                    ->getInternalInstance();
  Qt::ImageConversionFlags flags = static_cast<Qt::ImageConversionFlags>(
      info[1].As<Napi::Number>().Int32Value());
  QPixmap pixmap = QPixmap::fromImage(*img, flags);
  auto instance = QPixmapWrap::constructor.New(
      {Napi::External<QPixmap>::New(env, new QPixmap(pixmap))});
  return instance;
}

Napi::Value StaticQPixmapWrapMethods::fromQVariant(
    const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();
  Napi::Object variantObject = info[0].As<Napi::Object>();
  QVariantWrap* variantWrap =
      Napi::ObjectWrap<QVariantWrap>::Unwrap(variantObject);
  QVariant* variant = variantWrap->getInternalInstance();
  QPixmap pixmap = variant->value<QPixmap>();
  auto instance = QPixmapWrap::constructor.New(
      {Napi::External<QPixmap>::New(env, new QPixmap(pixmap))});
  return instance;
}